package niuke;

import java.util.Scanner;

public class 小易喜欢的单词 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        char[] chars = str.toCharArray();
        char last = 'a';

        //排除前两个条件
        for(int i=0;i<chars.length;i++){
            if(chars[i]<65 || chars[i]>90 || chars[i]==last){
                System.out.println("DISLIKE");
                return;
            }
            last = chars[i];
        }


    }
}
